Investigation of its characterization, modification of Denizli region diatomaceous earth

In this study, obtained diatomite from Denizli region was used. Diatomite was treatedwith phosphoric asid to increase the surcafe area, create oxide structures and perform a good proton transfer. The phosphoric acid concentration was investigateas as a parameter. This process was carried out under condencer. Because adsorption forces of inorganic elements are high, the diatomites treated with acid were modification with aluminum. Thus, diatomite structure was wanted to make similar zeolite form. Alterations in the build-ups were determined by changing the Al concentrations and conditions. Zeolites have very high adsorption capacities. The use of diatomite supprted Al for the removel of Sr from aqueous solution was investigated. Adsorption experiments were made with Sr solutions at certain concentrations by the bach sistem in experimental tupes. In the study, the scanning electron mikroscopy (SEM), multi-surfaces analysis method (BET), Xray fluorescence spectrum (XRF) and FITIR were used for the characterization analysis. Thus, changes in diatomite and modified diatomite structures have been observed. In the light of the analys made, adsorbtion properties of the adsorbent were examined by means of developments in the physical and chemical in the materials. The perameters affecting adsorption as the pH of solution, initial strontium concentration, shaking time and temparature were investigated. Adsorbtion kinetic and isoterms applied to describe the adsorption mechanism from the experimental data obtained. It was seen that the surface areas of diatomite treated with phosphoric acid and modified with Al is increase as 49,99 m2.g-1 and 43,21 m2.g-1, respectively, when natural diatomite is 28,12 m2.g-1. It is observed that the strontium adsorbtion is well fitted with Langmuir isoterm and the kinetic model follows the Pseudo second order. The optimum condition for adsorption efficiency was determined as Sr+2 solution containg 50 mg.L-1 at pH=8 and in 120 minutes. Under these conditions, the efficiency was calculated as 92,9±%. It is seen that the modified diatomite which is the source of our country, as low cost adsorbent, will be able to use for Sr+2 uptake.